Outer Diameter - Outer Valve Spring: 1.645"
Inner Diameter - Outer Valve Spring: 1.195"
Inner Diameter - Inner Valve Spring: 0.871"
Installed Height: 2.050"
Installed Load / Height (Valve Closed): 207 LB @ 2.050""
Open Height: 1.250"
Open Load: 671 PS
Open Load / Height (Valve Open): 671 LB @ 1.250"
Valve Spring Rate: 580 PS
Max Coil Bind: 1.130"
Max Valve Lift: 0.800"
Recommended Valve Spring Retainer - 300 Series: R383
Recommended Valve Spring Retainer - 400 Series: N/A
Recommended Valve Spring Retainer - 500 Series: N/A
Recommended Valve Spring Retainer - 600 Series: N/A
Recommended Valve Spring Seat: S101, S102
Recommended Valve Spring Cup: N/A
Valve Spring Series: 1900 Series
Valve Spring Type: Dual
Primary Application: Drag Race, Street Performance
Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Jul 10 - Jul 15
Promo Codes Available:
For Your Every Summer RSVP, with Code: SUMMER15
Description
PAC 1900 Series Dual Valve Springs, 1.645" O.D, Set of 16 - PAC-1950-16DUAL VALVE SPRINGS, 1. 645" OD 207 671lbs @ 2. 050", . 800" Lift, 1. 115" Coil Bind Part Number: PAC 1950 16 PAC Racing's 1900 Series Hot RO. D Valve Springs provide performance and quality on a budget. These springs utilize our signature PACaloy super clean wire and undergo a multi peen process to optimize service life. Applications include Small Block Chevy, Big Block Chevy, AMC, GM Gen III IV LS, Big Block Ford, Big Block Mopar, Buick V8, and more.
DUAL VALVE SPRINGS, 1.645" OD
207-671lbs @ 2.050", .800" Lift, 1.115" Coil Bind
Part Number: PAC-1950-16
PAC Racing's 1900 Series Hot RO.D Valve Springs provide performance and quality on a budget. These springs utilize our signature PACaloy super clean wire and undergo a multi-peen process to optimize service life. Applications include Small Block Chevy, Big Block Chevy, AMC, GM Gen III/IV LS, Big Block Ford, Big Block Mopar, Buick V8, and more.
- Built using our signature PACaloy super clean wire to ensure strength and durability
- Multi-peen process to optimize service life ?
- Available in single and dual spring configurations
Specifications:
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.6 ★★★★★
Based on 740 reviews
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Product Reviews
★★★★★ 5
Extremely satisfied
Size: 24x5.8, Color: Black, Size: 24x5.8, Color: Black
Very nice. I am extremely happy with them. I used painters tape to hold the bracket in place while I screwed it in, worked like a charm 😁 holds a lot of items
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Reviewed in the United States on April 11, 2026
★★★★★ 3
Good enough
Size: 15x6.8, Color: Black
As cheap as the day is long but functional. These are basically made out of highly compressed paper and finished to feel like wood. The first one I put up was good with a little tilt to the back which is fine. The second one has a more severe tilt and I had to bend the bracket down to decently level it out. They are sturdy enough to hold quite a bit of weight and look good for what they are. I'm not impressed but I'm also not disappointed, the price is a bit steep for what they are but they serve their purpose.
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Reviewed in the United States on November 15, 2025
★★★★★ 4
Great, but bring your own inserts.
Size: 24x7.9, Color: Black
These work great, easy to install. Happy with them. Only problem was the instructions say don’t use the include inserts on wallboard, which meant I had to go out and purchase my own. That’s OK, because I like to use inserts I trust.
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Reviewed in the United States on December 9, 2025
★★★★★ 5
Sturdy and attractive
Size: 15x6.8, Color: Black, Size: 15x6.8, Color: Black
Love the shelves, great quality and design. They are very sturdy and perfect for my need. I ordered wine glass holders from Amazon and attached them to the shelves. Impressed and amazed at the look.
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Reviewed in the United States on November 18, 2025
★★★★★ 5
Beautiful shelves.
Size: 24x7.9, Color: White
Beautiful shelves. Easy to put up once you get the holes level.
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Reviewed in the United States on April 28, 2026